Tool-driving mechanism.



J. M. THOMPSON.

TOOL DRIVING MECHANISM. APPLICATION FILED MAR.31,1910.

Patented- July 21,1914.

-UNITED OFFICE.

JAMES a. 'rfiomrsoiv, or MILWAUKEE, WISCONSIN, ASSIGNOR 'ro LUTHER BROS.co.,

or MILWAUKEE, WISCONSIN, A CORPORATION or WISCONSIN.

TOOL-DRIVING MECHANISM.

Specification of Letters Patent Patented July 21, 1914.

To all whom it may concern:

Be it known that I, JAMES M. THOMPSON, a citizen of the United States,residing at Milwaukee, county of Milwaukee, and State of lVisconsin,have invented new and useful Improvements in ToolDrivin'g Mechanism, ofwhich the following is a specification.

My invention relates to improvements in foot power driving mechanism forgrinding wheels, boring tools, etc.

The object of my invention is to provide a form of construction in whichthe various tools may be adjusted in any desired position with referenceto the operator, in accordance with 'the character of the work to beperformed.

-A further object of my invention is to provide a form of constructionwhich can be readily adjusted to suit the convenience of the operator,it being recognized that different operators require differentadjustments.

In the following description, reference is had to the accompanyingdrawings, in which Figure 1 is a side elevation of my invention, showinthe upper gear casing in section, and a so showing a grinding wheelmounted upon the driven shaft. Fig. 2 is a front elevation of the same,the upper casing being also shown in section. Fig. 3 is a detail sideview of a modified seat suport. p Like parts are identified by the samereference characters in both views.

A standard 1, the upper portion of which is tubular, is provided with asupporting brace 2, having a cross piece 3 at its lower end, whereby thestandard is supported-in a vertical position. The brace 2 is secured tothe upper portion of the standard by clamping plates 5 .connected witheach other in clamping position by bolts 6 and thumb ,nuts 7. Saidplates comprise a pair of members formed with semi-cylindrical standardengaging portions to engage the standard and flat surfaced portionsbetween which portions of the respective plates, the brace 2 is engaged.A seat supporting bar 8 is similarly secured to the standard by means ofclamping plates 9, a single clamping bolt ldbeing employed to connectthis late with the bar 8. The plates 9 are simiar to the plates 5 inform and arrangement. The bar 8 is also secured to the brace bar 2 by amember 12, which is movable longitudinally of the bar 2, and may,- ifdeslred, be clamped thereto in any position of ad'ustment, by means ofsuitable set screws or olts. The bar 8 extends beyond the brace bar 2and is provided with a seat 13 of any ordinary type. A gear casin 15 ismounted upon t e standard 1,'from w ich it is supported by clampingplates 16, bolts 17 and nuts 18. Thesenuts are preferably thumb nuts, sothat they can be readily adjusted to clamping or releasing position. Theupper end of the standard 1 has a c lindrical outer surface, so thatwhen tge nuts 18 are loosened, the casing 15 may be rotated upon thestandard.

A shaft 21 is journaled in suitable bearings at 22 and 23 in the casin15, and motion is transmitted to this sha t from pedal cranks 25,through the crank shaft 26, beveled gear wheel 27, pinion 28 verticalshaft 29, beveled gear wheel 30, and inion 31, the latter being fast onshaft 21. n the drawings, I have illustrated the shaft 21 as provided atone end with a grinding wheel 33 and at the other end with a drill 34.Both the grinding wheel and the drill are detachably connected with theshaft 21, so that they can be readily removed and other toolssubstituted therefor. In Fig. 1, I have illus trated a single rest 35 ofordinary type, removably connected with the casing 15 at 37. Tool restsof various descriptions, or other work holders, may be substituted forthe single rest 35 in an obvious manner.

With the above described construction, it will be apparent that the seatsupporting bar 8 may be raised or lowered to any desired height inaccordance with the requirements of the user since it may be clamped tothe brace and standard at any desired height. It may also be tilted atany desired angle by adjusting the clamping plates 9 vertically on thestandard 1 without making a relative change in the position of thesupporting members 12 on the brace bar 2. It will also be observed thatthe tubular portion of the standard 1 terminates immediately above thepinion 28, the standard slotted at 44 to permit the same to move 110longitudinally, when the bolt 43 is loosened seat is not illustratedinthis. view but it will be understood that a seat similar to thatillustrated in Fig. 1 may be employed, which is adjustable along the baror bars 8 to suit the requirements of the operator.

Having thusdeseribedmy invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A foot power driving mechanism comprising a standard having a baseportion adapted to rest upon the floor and provided with an uprighttubular upper portion, a support having adjustable swivel connectionwith the upper portionof the standard, means for locking the same to thestandard in any desired position of rotative adjustment, a

crank shaft journaled in said base and provided with foot pedals, avertical shaft journaled in the tubular standard and provided with gearwheels at its upper and lower ends, a gear wheel on the crank shaft inmesh with the gear wheel on the vertical shaft, and a driven shaftprovided with a .gear. wheel in mesh with the upper gear wheel on thevertical shaft and journaled in said support, said driven shaft beingadapted for direct, connection of suitable tools therewith, and saidtools being adapted to operate at any angle in a horizontal 'plane aboutsaid standard, by appropriate the upper portion of the standard, meansfor locking the same to the standard in any desired position of rotativeadjustment, pedal and crank mechanism journaled in said base, a verticalshaft journaled in the tubular standard and driven from the pedal andcrank mechanism, and a driven shaft operatively connectedwith thevertical shaft and journaled in said support, said driven shaft beingadapted for direct connection of suitable tools therewith, together witha brace bar extending angularly from the upper portion of the standardto the floor, a seat bar adjustably connected with the brace bar, and aseat mounted on said seat bar.

' In testimony whereof I afiix my signature in the presence of twowitnesses.

JAMES M. THOMPSON. Witnesses:

I. D. BREMER, LEVERETT C. WHEELER.

